No. 10: Train Reaction Device (Sky Mall). "It's like having an extra hand when you're toting multiple pieces of wheeled luggage." It probably works, and it's definitely for travelers, but it enables those inconsiderate boobs who think it's OK to bring two roll-aboard size bags on board, calling one a "personal item." If you can't carry it, it's not a personal item. http://www.skymall.com/train-reaction-device/WCW101.html

No. 9: MeCam. Wearable 720p camera "to capture your life in video" -- because your life is so interesting and action-packed that shooting the highlights isn't enough. That is, until you watch it and find out that life in real time on video is like watching paint dry. Probably more useful for pinning on drunk friends for a reality check later. https://www.mecam.me

No. 8: Travel HoodiePillow (Sky Mall). Apparently, the missing element from those U-shaped travel pillows is a hood that makes you look like the Unibomber. Sweet dreams? http://www.skymall.com/travel-hoodiepillow/27210GRP.html

No. 7: Gin and Titonic ice cube tray (Archie McPhee). Truthfully, we love being able to watch Titanic-shaped ice nose down in a glass, but you wouldn't want one of these in your carry-on going through customs in Belfast, where they're pretty proud of having built one of history's most memorable failures. http://mcphee.com/shop/gin-and-titonic-ice-cube-tray.html

No. 6: The Sky Rest (Sky Mall). It's a giant inflatable wedge for sleeping better on planes. Drink service? Deflate. Meal service? Deflate. Restroom break? Deflate. The reason you sleep so well is because you're hyperventilating from blowing this thing up. (And at 14-inches wide, it pretty much forces you to hog the armrests on both sides of your 16-inch seat.) http://www.skymall.com/skyrest-travel-pillow/99010.html

No. 5: EMT Cooler Bag (Fred & Friends). This handy, insulated bag will get you special treatment at the airport -- until agents find a six pack and a ham sandwich instead of a transplant kidney. That's when the really "special" treatment begins.
http://fredandfriends.com/products/view/category/life/e.m.t.-cooler-bag

No. 4: Stress Beater (Fred & Friends). You know it's just a rubbery stress ball shaped like a pair of brass knuckles, but will the TSA agent who's been on the night shift all week? Hmm. (Put it in checked luggage because, according to TSA, real brass knuckles are OK in checked bags -- despite being an illegal weapon in most states.) http://fredandfriends.com/products/view/category/desk-and-paper/stress-beaters

No. 3: TSA T-shirt (Despair, Inc.). "Transportation Security Administration: We're making travel a touching experience." Heck yes, it's funny. Right up until the agents take you to soundproof back room and start putting on rubber gloves. How 's that for irony?
http://www.despair.com/tsa-touching-experience.html

No. 2: Mini Biohazard Tape (Archie McPhee). The dispenser comes with 100 feet of realistic (albeit smaller) warning tape, but it would only take about 6 inches of it on a carry-on bag to shut down an international airport for a few hours. Big fun. http://mcphee.com/shop/mini-biohazard-tape.html

No. 1: Grenade Travel Set containers (Kikkerland). Regulation size bottles for liquids that are (wait for it) shaped like hand grenades.
Generally harmless fun -- except that as of September, TSA agents had found more than 80 actual hand grenades in carry-on and checked luggage so far in 2013. We don't know what happened to those people, but it's a safe bet they missed their flights. A clear winner as Worst Travel Gift ever. (No longer available through maker Kikkerland, but still available at Amazon.com: http://www.amazon.com/Kikkerlandgrenade-Travel-Squeeze-Bottles-Carrying/dp/B00C2DUOIG